Failure to create custom variable?

[danger.ngai]

Hi I just try to use Robotask for few days.
I want to define some custom variables, but after I put in the name and initial value,
the OK button still under locked, what happen to this? Because I am using trial version?
(See attached photo)

BTW, I would like to get the file name (name format as follow) from a PDF file, and divided the file name into 3 parts for further processing,

Date_Location_Project Code.pdf

I will input these 3 parameters into a ERP system web page (Date / Location / Project code)

What method should I use? Define variables?

[Oleg]

You must enter variable name only (without braces)
Try the string REPORTNAME

[danger.ngai]

You must enter variable name only (without braces)
Try the string REPORTNAME

thanks, problem solved